A tensile resistance detection device for nonwoven fabric production

Abstract

This invention discloses a tensile strength testing device for nonwoven fabric production, belonging to the field of nonwoven fabric testing technology. The device comprises a lifting platform housed within a frame at the top of the base. A tensioning clamp on the platform is driven by a hydraulic pusher via a slider, forming a smoothing and locking component. A force gauge and positioning clamping structure are installed at the top of the frame. The tensioning clamp contains a bidirectional leveling component, including two oblique smoothing rollers that roll and smooth the fabric surface, and a buffer clamping assembly for shaping and holding. During tensile testing, the oblique smoothing rollers roll against the fabric surface from top to bottom. Their oblique arrangement generates downward and outward forces. Downward, they straighten the fibers longitudinally, eliminating sagging and bending; outward, they smooth longitudinal wrinkles laterally. When moving to the cutting point, a spring and connecting block move the clamp relative to the tensioning clamp, clamping and shaping the lower end. During stretching, the smoothing rollers maintain contact, using the force to suppress lateral shrinkage. Simultaneously, a pull rope, in conjunction with a piston, suctions away impurities, ensuring accurate testing.

Description

Technical Field

[0001] This invention relates to the field of nonwoven fabric testing technology, specifically to a tensile strength testing device for nonwoven fabric production. Background Technology

[0002] Nonwoven fabric, also known as non-woven cloth or non-woven material, refers to fabric formed directly by bonding fibers without the need for spinning or weaving processes. It is mainly made from polyester fibers and is produced using processes such as needle punching, spunbonding, and thermal bonding. It features breathability, moisture resistance, flame retardancy, lightweight, non-toxicity, odorlessness, biodegradability, and low cost. It is also recyclable. Nonwoven fabric is composed of oriented or randomly arranged fibers and is a new generation of environmentally friendly material. After production, nonwoven fabric undergoes various performance tests, including tensile strength testing, which requires specialized tensile strength testing equipment to ensure product quality reliability.

[0003] Tensile testing is one of the basic methods for testing the mechanical properties of materials. It is mainly used to verify whether materials meet the specified standards and to study the performance of materials. The data obtained from tensile testing can determine the elastic limit, elongation, elastic modulus, proportional limit, area reduction, tensile strength, yield point, yield strength and other tensile performance indicators of materials. In the existing technology, during the tensile testing of nonwoven fabrics, it is usually necessary to clamp and fix both ends of the nonwoven fabric. At this time, when the nonwoven fabric sample is fixed between the upper and lower clamping structures, it is usually in a relaxed state. Then, the driving structure of the testing instrument drives the lower positioning structure away from the upper positioning structure to stretch the nonwoven fabric sample and realize the tensile test.

[0004] As nonwoven fabrics become increasingly thinner and lighter, even tiny wrinkles can lead to stress concentration. Due to the material's low stiffness, fractures often begin at these points rather than at the material's weakest points. Therefore, in the early stages of moving the positioning structure below, the main task is to pre-straighten and flatten the relaxed nonwoven fabric sample before conducting subsequent tensile tests. This is to avoid the wrinkles in the nonwoven fabric sample affecting the accuracy of the tensile test. However, conventional tensile testing devices clamp and shape the two ends of the nonwoven fabric sample before straightening and flattening. During the subsequent straightening process, it is difficult to eliminate the ineffective stroke and stress concentration caused by the initial wrinkles. Furthermore, relying solely on straightening is insufficient to guarantee the elimination of wrinkles. Summary of the Invention

[0005] The purpose of this invention is to provide a tensile strength testing device for nonwoven fabric production, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a tensile strength testing device for nonwoven fabric production, comprising a base, a frame fixedly installed on the top of the base, and a lifting platform fixedly installed inside the frame, tension clamps symmetrically arranged on the upper surface of the lifting platform, mounting grooves symmetrically opened on the upper surface of the lifting platform, and hydraulic push rods fixedly installed on the inner wall of the mounting grooves, a force gauge fixedly installed on the top inner wall of the frame, and a positioning clamping structure fixedly installed on the lower side of the force gauge;

[0007] The two stretching clamps are respectively provided with bidirectional leveling components. The bidirectional leveling components include two smoothing rollers that are obliquely arranged inside the stretching clamps. The stretching clamps are provided with mounting grooves corresponding to the smoothing rollers. When the two smoothing rollers move down on the fabric surface, they will be rolled and smoothed by the oblique transmission assembly.

[0008] The bottom sides of the two stretching clamps are respectively provided with smoothing and locking components. The smoothing and locking components include sliders that are slidably disposed on the inner wall of the mounting groove. The bottom of the sliders is fixedly connected to a clamping block. The sides of the two sliders that are far apart are respectively connected to the output ends of two hydraulic push rods, so that the clamping block can be fixed and clamped by the buffer clamping assembly when the smoothing is finished.

[0009] Preferably, the oblique transmission assembly includes:

[0010] Two rotating shafts are fixedly connected to the end faces of the two smoothing rollers that are close to each other. A bevel gear is fixedly connected to the end face of the two rotating shafts that are close to each other. A helical gear is meshed with the side face of the two bevel gears that are close to each other. An installation groove three is opened inside the tensioning plate. Supporting bent rods are rotatably connected to the two end faces of the helical gear one. The ends of the two supporting bent rods that are far apart are fixedly connected to the inner walls of the two sides of the installation groove three. A helical gear two is meshed with the bottom side of the helical gear one.

[0011] Preferably, a support plate is fixedly connected to the opposite side of the two tension clamps, and a rotating column is fixedly connected to the opposite end face of the two helical gears. The outer wall of the rotating column is rotatably connected to the inner end of one end of the support plate. A rotating column is rotatably connected to the inner end of the other end of the support plate. A transmission belt is rotatably connected to the outer wall of one end of the rotating column and the outer wall of the same end of the rotating column. A transmission gear is fixedly connected to the adjacent end face of the two rotating columns. A toothed plate is fixedly connected to the top of the base corresponding to the transmission gear, and one side of the transmission gear meshes with one side of the toothed plate.

[0012] Preferably, the buffer clamping assembly includes:

[0013] A connecting block is fixedly connected to the bottom of the tension clamp. The top of the slider is provided with a groove corresponding to the connecting block, and the two outer walls of the connecting block are slidably connected to the two inner walls of the groove. A sliding column is fixedly connected to the two inner walls of the groove. The inside of the connecting block is slidably connected to the outer wall of the sliding column. A spring is provided on the outer wall of the sliding column. One end of the spring is fixedly connected to one inner wall of the groove, and the other end of the spring is fixedly connected to the outer wall of the two connecting blocks that are far apart.

[0014] Preferably, the inner wall of the mounting groove is symmetrically provided with clamping grooves corresponding to the clamping blocks, and the outer wall of the clamping blocks slides in contact with the inner wall of the clamping grooves.

[0015] Preferably, the top of the lifting platform has a through hole corresponding to the non-woven fabric sample, and the front sides of the two stretching clamps are respectively provided with a following dust suction component.

[0016] Preferably, the following vacuuming component includes a rotating rod that is fixedly connected to one side of each of the two helical gears. The outer wall of the rotating rod is provided with a groove, and a pull rope is fixedly connected to the inner wall of the groove. A vacuum cleaner is fixedly connected to the front outer wall of each of the two tension clamps, and a piston is slidably connected to the inner wall of the vacuum cleaner. The other end of the pull rope passes through the bottom of the vacuum cleaner and is fixedly connected to the bottom center of the piston.

[0017] Preferably, a second spring is fixedly connected to the bottom of the piston, and the bottom of the second spring is fixedly connected to the bottom inner wall of the vacuum cleaner, and a vacuum tube is fixedly connected to one side of the vacuum cleaner.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. During the tensile test of nonwoven fabric samples, two obliquely arranged smoothing rollers on each side are fixed at the top of the nonwoven fabric sample and roll along the fabric surface from top to bottom. The friction generated by their oblique arrangement is divided into downward and outward thrust. The downward thrust actively straightens the fabric fibers in the longitudinal direction, eliminating sagging and bending caused by gravity or initial placement, so that the fabric presents an ideal straight shape in the vertical direction. The outward thrust flattens the fabric fibers in the transverse direction, unfolding the longitudinal folds, so that the fabric is flat and smooth in the width direction. Through the main forces in two directions, the fabric is shaped into an ideal initial state that is vertical and flat, realizing the simultaneous shaping of the fabric in two dimensions.

[0020] 2. During the tensile test of the nonwoven fabric sample, when the smoothing roller moves down to the lower cut position of the nonwoven fabric sample, the fabric is already in a completely flat and ideal state under the action of straightening and smoothing. Using the cooperation of spring 1 and connecting block, the two clamping blocks move closer to the tension clamping plate independently, clamping and shaping the lower end of the nonwoven fabric. At this time, the tensile test can be carried out by moving the clamping blocks downward. At the same time, in order to avoid the transverse shrinkage that is easy to occur when the material is stretched longitudinally, the two inclined smoothing rollers can continue to maintain contact with the fabric surface and can roll freely. The downward and outward components of their force actively suppress the shrinkage in the width direction of the nonwoven fabric sample during the stretching process, avoiding the reduction of the cross-sectional area of ​​the sample. This makes the tensile test closer to the longitudinal stress state, and the measured force value reflects the material's own strength against tension, more realistically reflecting the tensile capacity of the material.

[0021] 3. During the tensile testing of nonwoven fabric samples, as the smoothing roller rolls downwards and outwards, the squeezing and friction between the roller and the nonwoven fabric sample will remove impurities such as dust, lint, and short fibers adhering to the fiber surface from the fiber network. At this time, through the cooperation of the pull rope and the piston, it can follow the smoothing roller during the downward smoothing process, always maintaining the shortest distance from the dust source, ensuring maximum dust collection efficiency, removing impurities to avoid affecting the tensile strength test results, and eliminating potential risks in the tensile test. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of a portion of the internal structure of the frame of the present invention;

[0024] Figure 3 This is a schematic diagram of the transmission relationship between the smoothing roller and the second helical gear in this invention;

[0025] Figure 4 This is a schematic diagram illustrating the transmission relationship between the helical gear II and the transmission gear of the present invention.

[0026] Figure 5 This is a schematic diagram illustrating the kinematic relationship between the tension clamp and the clamping block of the present invention.

[0027] Figure 6 This is a schematic diagram showing the connection relationship between the rotating rod and the piston in this invention.

[0028] In the diagram: 1. Base; 2. Frame; 3. Lifting platform; 4. Tension clamp; 8. Mounting slot one; 9. Hydraulic push rod; 10. Force gauge; 11. Positioning and clamping structure; 12. Through hole; 13. Clamping slot; 5. Bidirectional leveling component; 501. Mounting slot two; 502. Smoothing roller; 503. Rotating shaft; 504. Bevel gear; 505. Helical gear one; 506. Mounting slot three; 507. Supporting bent rod; 508. Helical gear two; 509. Support plate 510. Rotating column one; 511. Rotating column two; 512. Drive belt; 513. Drive gear; 514. Gear plate; 6. Smoothing and locking component; 601. Slider; 602. Clamping block; 603. Groove; 604. Connecting block; 605. Sliding column; 606. Spring one; 7. Following vacuuming component; 701. Rotating rod; 702. Cable groove; 703. Pull rope; 704. Vacuum cylinder; 705. Piston; 706. Spring two; 707. Vacuum hose. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1, please refer to Figures 1-6 This invention provides a tensile strength testing device for nonwoven fabric production, comprising a base 1, a frame 2 fixedly installed on the top of the base 1, and a lifting platform 3 fixedly installed inside the frame 2. Tension clamps 4 are symmetrically arranged on the upper surface of the lifting platform 3, and mounting grooves 8 are symmetrically opened on the upper surface of the lifting platform 3. A hydraulic push rod 9 is fixedly installed on the inner wall of the mounting groove 8. A force gauge 10 is fixedly installed on the top inner wall of the frame 2, and a positioning clamping structure 11 is fixedly installed on the lower side of the force gauge 10. A through hole 12 is opened on the top of the lifting platform 3 corresponding to the nonwoven fabric sample.

[0031] In this embodiment, when the device is being tested, one end of the nonwoven fabric sample is first clamped and fixed by the positioning clamping structure 11 fixedly installed on the lower side of the force measuring instrument 10. Then, the other end of the nonwoven fabric sample is passed through the through hole 12 in the center of the lifting platform 3 and hangs down naturally. Then, the lifting platform 3 drives the two tension clamps 4 to move to the highest point, that is, the position on the clamped side of the nonwoven fabric sample.

[0032] Then, since the two tension plates 4 are respectively equipped with bidirectional leveling components 5, each bidirectional leveling component 5 includes two smoothing rollers 502 obliquely arranged inside the tension plates 4. The tension plates 4 have mounting grooves 501 corresponding to the smoothing rollers 502. Thus, the hydraulic push rod 9 drives the two tension plates 4 to move closer together, causing the two obliquely arranged smoothing rollers 502 on each side to adhere to the fabric surfaces on both sides. Then, the lifting platform 3 can move the smoothing rollers 502 downwards from top to bottom, adhering to the fabric surfaces. During the downward movement of the smoothing rollers 502, the fabric surfaces are... The oblique transmission component drives the rotation, and its oblique layout divides the friction generated by the rotation into downward and outward thrust. The downward thrust actively straightens the fabric fibers along the longitudinal direction, eliminating sagging and bending caused by gravity or initial placement, so that the fabric presents an ideal straight shape in the vertical direction. The outward thrust flattens the fabric fibers along the transverse direction, unfolding the longitudinal folds, so that the fabric is flat and smooth in the width direction. Through the main forces in two directions, the fabric is shaped into an ideal initial state that is vertical and flat, realizing the simultaneous shaping of the fabric in two dimensions.

[0033] Furthermore, the oblique transmission assembly includes;

[0034] Two rotating shafts 503 are fixedly connected to the near end faces of two smoothing rollers 502 respectively. A bevel gear 504 is fixedly connected to the near end face of the two rotating shafts 503 respectively. A helical gear 505 is meshed on the near side of the two bevel gears 504. An installation groove 3 506 is opened inside the tension clamp 4. Supporting bent rods 507 are rotatably connected to the two end faces of the helical gear 1 505. The far ends of the two supporting bent rods 507 are fixedly connected to the inner walls of the two sides of the installation groove 3 506 respectively. A helical gear 2 508 is meshed on the bottom side of the helical gear 1 505.

[0035] Support plates 509 are fixedly connected to the opposite sides of the two tension clamps 4. Rotary columns 510 are fixedly connected to the opposite ends of the two helical gears 508. The outer wall of the rotating column 510 is rotatably connected to the inner end of one end of the support plate 509. Rotary columns 511 are rotatably connected to the inner end of the other end of the support plate 509. A transmission belt 512 is rotatably connected to the outer wall of one end of the rotating column 511 and the outer wall of the same end of the rotating column 510. Transmission gears 513 are fixedly connected to the adjacent ends of the two rotating columns 511. A toothed plate 514 is fixedly connected to the top of the base 1 corresponding to the transmission gears 513. One side of the transmission gears 513 meshes with one side of the toothed plate 514.

[0036] Specifically, through the engagement of the transmission gear 513 and the toothed plate 514, the transmission gear 513 can translate horizontally in the toothed plate 514 when the tension clamping plates 4 approach and separate, without affecting its subsequent vertical transmission meshing. Support plates 509 are fixedly connected to the opposite sides of the two tension clamping plates 4, and rotating columns 510 are fixedly connected to the opposite ends of the two helical gears 508. The outer wall of the rotating column 510 is rotatably connected to the inner end of one end of the support plate 509. The other end of plate 509 is rotatably connected to a rotating column 511, and a transmission belt 512 is rotatably connected to the outer wall of one end of rotating column 511 and the outer wall of the same end of rotating column 510. The two rotating columns 511 are respectively fixedly connected to the ends of the two rotating columns 511. So when the tension clamping plate 4 moves down, the transmission gear 513 can be driven to move vertically down on the toothed plate 514 through the support plate 509, and then the helical gear 508 at one end of the support plate 509 can be driven to rotate through the transmission belt 512.

[0037] Furthermore, a rotating shaft 503 is fixedly connected to one end face of the two smoothing rollers 502. A bevel gear 504 is fixedly connected to one end face of the two rotating shafts 503. A helical gear 505 is meshed on one side of the two bevel gears 504. Supporting rods 507 are rotatably connected to both ends face of the helical gear 505. The ends of the two supporting rods 507 are fixedly connected to the inner walls of the two sides of the mounting groove 506. A helical gear 508 is meshed on the bottom side of the helical gear 505. When the helical gear 508 rotates, the helical teeth on both ends face of the helical gear 505 can drive the two bevel gears 504 to rotate, thereby synchronously driving the two obliquely arranged smoothing rollers 502 to rotate and roll during the downward movement.

[0038] In Example 2, based on the above example, a smoothing and locking component 6 is provided on the bottom side of each of the two tension clamps 4. The smoothing and locking component 6 includes a slider 601 that is slidably disposed on the inner wall of the mounting groove 8. A clamping block 602 is fixedly connected to the bottom of the slider 601. The sides of the two sliders 601 that are far apart are respectively connected to the output ends of the two hydraulic push rods 9.

[0039] Furthermore, the buffer clamping assembly includes:

[0040] The connecting block 604 is fixedly connected to the bottom of the tension clamping plate 4. The top of the slider 601 is provided with a groove 603 corresponding to the connecting block 604. The outer walls of both sides of the connecting block 604 are slidably connected to the inner walls of both sides of the groove 603. The inner walls of both sides of the groove 603 are fixedly connected to the sliding column 605. The inside of the connecting block 604 is slidably connected to the outer wall of the sliding column 605. The outer wall of the sliding column 605 is provided with a spring 606. One end of the spring 606 is fixedly connected to one side of the inner wall of the groove 603. The other end of the spring 606 is fixedly connected to the outer wall of the two connecting blocks 604 that are far apart. The inner wall of the mounting groove 8 is symmetrically provided with a clamping groove 13 corresponding to the clamping block 602. The outer wall of the clamping block 602 is in contact with the inner wall of the clamping groove 13 and slides.

[0041] In this embodiment, the two sliders 601 are connected to the output ends of two hydraulic push rods 9 on opposite sides, so that the two sliders 601 and the clamping block 602 can be moved closer together synchronously by the hydraulic push rods 9. Then, the connecting block 604 is fixedly connected to the bottom of the stretching clamping plate 4. The top of the slider 601 is provided with a groove 603 corresponding to the connecting block 604, and the outer walls of both sides of the connecting block 604 are slidably connected to the inner walls of both sides of the groove 603. The inner walls of both sides of the groove 603 are fixedly connected to the sliding column 605. The inside of the connecting block 604 is slidably connected to the outer wall of the sliding column 605. The outer wall of the sliding column 605 is provided with a spring 606. So, at the beginning of the smoothing stage, the elastic force of the spring 606 will drive the stretching clamping plate 4 fixedly connected to the connecting block 604 to move closer together until the smoothing roller 502 is in contact with the fabric.

[0042] Furthermore, the inner wall of the mounting groove 8 is symmetrically provided with clamping grooves 13 corresponding to the clamping block 602, and the outer wall of the clamping block 602 slides in contact with the inner wall of the clamping groove 13.

[0043] Specifically, when the smoothing roller 502 moves to a suitable position at the lower end of the nonwoven fabric sample, the hydraulic push rod 9 can be used to drive the two sliders 601 to continue to move closer. At this time, under the buffer of the spring 606, the two clamping blocks 602 move closer to the tensioning clamping plate 4 respectively, clamping and shaping the lower end of the nonwoven fabric. At this time, the fabric is in a completely flat and ideal state under the action of straightening and smoothing. At this time, the clamping blocks 602 can be used to move the fabric downward to conduct a tensile test. At the same time, in order to avoid the transverse shrinkage that is easy to occur when the material is stretched longitudinally, the two inclined smoothing rollers 502 can continue to maintain contact with the fabric surface and can roll freely. They actively suppress the shrinkage in the width direction of the nonwoven fabric sample during the stretching process by using their downward and outward component forces, avoiding the reduction of the cross-sectional area of ​​the sample. This makes the tensile test closer to the longitudinal stress state, and the measured force value reflects the material's own strength against tension, more realistically reflecting the tensile strength of the material.

[0044] In Example 3, based on the above examples, the front sides of the two tension plates 4 are respectively provided with following dust collection components 7.

[0045] Furthermore, the following vacuuming component 7 includes a rotating rod 701 that is fixedly connected to the side of each of the two helical gears 508. The outer wall of the rotating rod 701 is provided with a wire groove 702, and a pull rope 703 is fixedly connected to the inner wall of the wire groove 702. The front outer walls of the two tension plates 4 are respectively fixedly connected to a vacuum tube 704, and a piston 705 is slidably connected to the inner wall of the vacuum tube 704. The other end of the pull rope 703 passes through the bottom of the vacuum tube 704 and is fixedly connected to the bottom center of the piston 705.

[0046] Furthermore, a second spring 706 is fixedly connected to the bottom of the piston 705, and the bottom of the second spring 706 is fixedly connected to the bottom inner wall of the vacuum cleaner 704. A vacuum cleaner tube 707 is fixedly connected to one side of the vacuum cleaner 704.

[0047] In this embodiment, during the downward smoothing process of the tension clamp 4, a rotating rod 701, fixedly connected to the side of each of the two helical gears 508, is used. The outer wall of the rotating rod 701 has a groove 702, and a pull rope 703 is fixedly connected to the inner wall of the groove 702. A vacuum cleaner 704 is fixedly connected to the front outer wall of each of the two tension clamps 4, and a piston 705 is slidably connected to the inner wall of the vacuum cleaner 704. The other end of the pull rope 703 passes through the bottom of the vacuum cleaner 704 and is fixedly connected to the bottom center of the piston 705. Therefore, during the rotation of the rotating rod 701, the pull rope 703 drives the piston 705 located inside the vacuum cleaner 704 to slowly move downwards. A second spring 706 is fixedly connected to the bottom of the piston 705, and the bottom of the second spring 706 is fixedly connected to the bottom inner wall of the dust collection cylinder 704. A suction pipe 707 is fixedly connected to one side of the dust collection cylinder 704. During the downward and outward rolling of the smoothing roller 502, the squeezing and friction between the roller and the nonwoven fabric sample will carry out dust, lint, short fibers and other impurities attached to the fiber surface from the fiber network. Thus, the suction pipe 707 can move with the smoothing roller 502 during the downward smoothing process, always maintaining the shortest distance from the dust source, ensuring maximum dust collection efficiency, removing debris to avoid affecting the tensile strength test results, and eliminating potential risks in the tensile test.

[0048] After the tensile test is completed, the tension clamp 4 and the positioning clamping structure 11 are released. After the nonwoven fabric sample is removed, the lifting platform 3 is raised. Under the rebound force of the spring 706, the collected impurities are discharged. The discharged impurities can then be processed.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tensile strength testing device for nonwoven fabric production, comprising a base (1), characterized in that: A frame (2) is fixedly installed on the top of the base (1), and a lifting platform (3) is fixedly installed inside the frame (2). A tension clamp (4) is symmetrically arranged on the upper surface of the lifting platform (3). An installation groove (8) is symmetrically opened on the upper surface of the lifting platform (3), and a hydraulic push rod (9) is fixedly installed on the inner wall of the installation groove (8). A force gauge (10) is fixedly installed on the top inner wall of the frame (2), and a positioning clamping structure (11) is fixedly installed on the lower side of the force gauge (10). The two stretching clamps (4) are respectively provided with bidirectional leveling components (5). The bidirectional leveling components (5) include two smoothing rollers (502) obliquely arranged inside the stretching clamps (4). The stretching clamps (4) are provided with mounting grooves (501) corresponding to the smoothing rollers (502). When the two smoothing rollers (502) move down to adhere to the fabric surface, they are rolled and smoothed by the oblique transmission components. The bottom sides of the two stretching clamps (4) are respectively provided with smoothing locking components (6). The smoothing locking components (6) include sliders (601) that are slidably disposed on the inner wall of the mounting groove (8). A clamping block (602) is fixedly connected to the bottom of the slider (601). The two sliders (601) are respectively connected to the output ends of two hydraulic push rods (9) on opposite sides, so that the clamping block (602) can be fixedly clamped by the buffer clamping assembly when the smoothing is finished.

2. The tensile strength testing device for nonwoven fabric production according to claim 1, characterized in that, The oblique transmission assembly includes: A rotating shaft (503) is fixedly connected to one end face of the two smoothing rollers (502). A bevel gear (504) is fixedly connected to one end face of the two rotating shafts (503). A helical gear (505) is meshed on one side of the two bevel gears (504). An installation groove (506) is provided inside the tension clamp (4). A support rod (507) is rotatably connected to both ends face of the helical gear (505). The ends of the two support rods (507) that are far apart are fixedly connected to the inner walls of the two sides of the installation groove (506). A helical gear (508) is meshed on the bottom side of the helical gear (505).

3. The tensile strength testing device for nonwoven fabric production according to claim 2, characterized in that, Support plates (509) are fixedly connected to the opposite sides of the two tension clamps (4). Rotary columns (510) are fixedly connected to the opposite ends of the two helical gears (508). The outer wall of the rotating column (510) is rotatably connected to the inner end of one end of the support plate (509). Rotary columns (511) are rotatably connected to the inner end of the other end of the support plate (509). A transmission belt (512) is rotatably connected to the outer wall of one end of the rotating column (511) and the outer wall of the same end of the rotating column (510). Transmission gears (513) are fixedly connected to the adjacent ends of the two rotating columns (511). A toothed plate (514) is fixedly connected to the top of the base (1) corresponding to the transmission gear (513). One side of the transmission gear (513) meshes with one side of the toothed plate (514).

4. A tensile strength testing device for nonwoven fabric production according to claim 2 or 3, characterized in that, The buffer clamping assembly includes: A connecting block (604) is fixedly connected to the bottom of the tension clamp (4). The top of the slider (601) is provided with a groove (603) corresponding to the connecting block (604). The outer walls of both sides of the connecting block (604) are slidably connected to the inner walls of both sides of the groove (603). A sliding column (605) is fixedly connected to the inner walls of both sides of the groove (603). The interior of the connecting block (604) is slidably connected to the outer wall of the sliding column (605). A spring (606) is provided on the outer wall of the sliding column (605). One end of the spring (606) is fixedly connected to one side of the inner wall of the groove (603). The other end of the spring (606) is fixedly connected to the outer wall of the two connecting blocks (604) that are far apart.

5. The tensile strength testing device for nonwoven fabric production according to claim 4, characterized in that, The inner wall of the mounting groove (8) is symmetrically provided with clamping grooves (13) corresponding to the clamping block (602), and the outer wall of the clamping block (602) slides in contact with the inner wall of the clamping groove (13).

6. The tensile strength testing device for nonwoven fabric production according to claim 4, characterized in that, The top of the lifting platform (3) has a through hole (12) corresponding to the non-woven fabric sample, and the front sides of the two stretching plates (4) are respectively provided with a following dust suction component (7).

7. The tensile strength testing device for nonwoven fabric production according to claim 6, characterized in that, The following vacuuming component (7) includes a rotating rod (701) fixedly connected to the side of the two helical gears (508) respectively. The outer wall of the rotating rod (701) is provided with a wire groove (702), and a pull rope (703) is fixedly connected to the inner wall of the wire groove (702). The front outer walls of the two tension plates (4) are respectively fixedly connected with a vacuum tube (704), and a piston (705) is slidably connected to the inner wall of the vacuum tube (704). The other end of the pull rope (703) passes through the bottom of the vacuum tube (704) and is fixedly connected to the bottom center of the piston (705).

8. The tensile strength testing device for nonwoven fabric production according to claim 7, characterized in that, The bottom of the piston (705) is fixedly connected to a second spring (706), and the bottom of the second spring (706) is fixedly connected to the bottom inner wall of the vacuum cleaner (704). A vacuum tube (707) is fixedly connected to one side of the vacuum cleaner (704).

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